Hello Cardiff
Here are the details
Have found no trace of any of them on any later census as yet.
Rhys
 Aberdare 1851
 HO 107 2460   f480 p11 
HIRWAUN 
STEPHENS JOHN HD M 36 LABOURER CMN - 
STEPHENS MARGARET WI M 39 LABOURER'S WIFE CMN - 
STEPHENS EVAN SO U 23 ROWLER  GLA ABERDARE 
THOMAS JEMIMA SV U 14 HOUSE SERVANT GLA ABERDARE 
MORGANS MARY VR U 6 AT HOME GLA MERTHYR 
PARKER RICHARD VR U 20 PUDDLER MON CHEPSTOW